Qt自定义窗口部件

转：http://qimo601.iteye.com/blog/1407257

QtDesigner自定义窗口部件有两种方法：改进法(promotion)和插件法(plugin)

改进法

1、改进法之前，要先写好子类化QSpinBox后的HexspinBox.h和HexspinBox.cpp文件。把这两个文件拷贝到想要的项目中。

HexspinBox.h

#ifndef HEXSPINBOX_H
#define HEXSPINBOX_H
#include
class QRegExpValidator;
class HexSpinBox : public QSpinBox
{
    Q_OBJECT

public:
    HexSpinBox(QWidget *parent = 0);

protected:
    QValidator::State validate(QString &text, int &pos) const;
    int valueFromText(const QString &text) const;
    QString textFromValue(int value) const;

private:
    QRegExpValidator *validator;
};

#endif

#ifndef HEXSPINBOX_H
#define HEXSPINBOX_H
#include 
class QRegExpValidator;
class HexSpinBox : public QSpinBox
{
    Q_OBJECT

public:
    HexSpinBox(QWidget *parent = 0);

protected:
    QValidator::State validate(QString &text, int &pos) const;
    int valueFromText(const QString &text) const;
    QString textFromValue(int value) const;

private:
    QRegExpValidator *validator;
};

#endif

 HexspinBox.cpp

#include
#include "hexspinbox.h"
HexSpinBox::HexSpinBox(QWidget *parent)
    : QSpinBox(parent)
{
    setRange(0, 255);
    validator = new QRegExpValidator(QRegExp("[0-9A-Fa-f]{1,8}"), this);
}

QValidator::State HexSpinBox::validate(QString &text, int &pos) const
{
    return validator->validate(text, pos);
}

int HexSpinBox::valueFromText(const QString &text) const
{
    bool ok;
    return text.toInt(&ok, 16);
}

QString HexSpinBox::textFromValue(int value) const
{
    return QString::number(value, 16).toUpper();
}

#include 
#include "hexspinbox.h"
HexSpinBox::HexSpinBox(QWidget *parent)
    : QSpinBox(parent)
{
    setRange(0, 255);
    validator = new QRegExpValidator(QRegExp("[0-9A-Fa-f]{1,8}"), this);
}

QValidator::State HexSpinBox::validate(QString &text, int &pos) const
{
    return validator->validate(text, pos);
}

int HexSpinBox::valueFromText(const QString &text) const
{
    bool ok;
    return text.toInt(&ok, 16);
}

QString HexSpinBox::textFromValue(int value) const
{
    return QString::number(value, 16).toUpper();
}

 

2、在需要开发的项目中的窗口中，

1、用Qt Designer创建一个新的窗体main.ui，把控件箱里的QSpinBox添加到窗体中。

2、右击微调框，选择“Promote to ”上下文菜单。

3、在弹出的对话框中，类名处填写“HexSpinBox”，头文件填写“hexspinbox.h”

好了。在ui生成的包含有QSpinBox的控件文件中，ui的源代码里面多了一段

 

   HSpinBox

   QSpinBox

   

hspinbox.h

 

包含文件变为"hexspinbox.h"。在Qt Designer中，QSpinBox表示的控件为HexSpinBox，并且可以设置所有的QSpinBox的属性。

可以在VS2008中编译一下main.ui文件，从ui_main.h源代码中可以知道，引入的控件是：

#include
#include
#include
#include "hspinbox.h"

QT_BEGIN_NAMESPACE

class Ui_QMainClass
{
public:
    QWidget *centralWidget;
    QPushButton *pushButton;
    QTableWidget *tableWidget;
    QSpinBox *spinBox;
    HSpinBox *hspinBox;

#include 
#include 
#include 
#include "hspinbox.h"

QT_BEGIN_NAMESPACE

class Ui_QMainClass
{
public:
    QWidget *centralWidget;
    QPushButton *pushButton;
    QTableWidget *tableWidget;
    QSpinBox *spinBox;
    HSpinBox *hspinBox;

 

   

升级法的缺点是不能在Qt Designer中设置自定义控件自己的特有属性，也不能够绘制自己。这些问题可以用插件法解决。

插件法

1.VS中创建Qt4 Design Plugin 工程 ，名称叫custom

自动建立如下几个文件：

自定义控件：custom.h,custom.cpp

插件：customplugin.h,customplugin.cpp

源代码如下：

custom.h

 

#ifndef CUSTOM_H
#define CUSTOM_H
#include
#include "ui_test.h"
class custom : public QWidget
{
    Q_OBJECT
public:
    custom(QWidget *parent = 0);
    ~custom();
private:
    Ui::Form ui;
};

#endif // CUSTOM_H

#ifndef CUSTOM_H
#define CUSTOM_H
#include 
#include "ui_test.h"
class custom : public QWidget
{
	Q_OBJECT
public:
	custom(QWidget *parent = 0);
	~custom();
private:
	Ui::Form ui;
};

#endif // CUSTOM_H

 

 custom.cpp

 

#include "custom.h"

custom::custom(QWidget *parent)
    : QWidget(parent)
{
    ui.setupUi(this);
}

custom::~custom()
{

}

#include "custom.h"

custom::custom(QWidget *parent)
	: QWidget(parent)
{
	ui.setupUi(this);
}

custom::~custom()
{

}

 

customplugin.h

 

#ifndef CUSTOMPLUGIN_H
#define CUSTOMPLUGIN_H

#include

class customPlugin : public QObject, public QDesignerCustomWidgetInterface
{
    Q_OBJECT
    Q_INTERFACES(QDesignerCustomWidgetInterface)

public:
    customPlugin(QObject *parent = 0);

    bool isContainer() const;
    bool isInitialized() const;
    QIcon icon() const;
    QString domXml() const;
    QString group() const;
    QString includeFile() const;
    QString name() const;
    QString toolTip() const;
    QString whatsThis() const;
    QWidget *createWidget(QWidget *parent);
    void initialize(QDesignerFormEditorInterface *core);

private:
    bool initialized;
};

#endif // CUSTOMPLUGIN_H

#ifndef CUSTOMPLUGIN_H
#define CUSTOMPLUGIN_H

#include 

class customPlugin : public QObject, public QDesignerCustomWidgetInterface
{
	Q_OBJECT
	Q_INTERFACES(QDesignerCustomWidgetInterface)

public:
	customPlugin(QObject *parent = 0);

	bool isContainer() const;
	bool isInitialized() const;
	QIcon icon() const;
	QString domXml() const;
	QString group() const;
	QString includeFile() const;
	QString name() const;
	QString toolTip() const;
	QString whatsThis() const;
	QWidget *createWidget(QWidget *parent);
	void initialize(QDesignerFormEditorInterface *core);

private:
	bool initialized;
};

#endif // CUSTOMPLUGIN_H

 

 customplugin.cpp

#include "custom.h"
#include
#include "customplugin.h"
customPlugin::customPlugin(QObject *parent)
    : QObject(parent)
{
    initialized = false;
}

void customPlugin::initialize(QDesignerFormEditorInterface */*core*/)
{
    if (initialized)
        return;
    initialized = true;
}

bool customPlugin::isInitialized() const
{
    return initialized;
}

QWidget *customPlugin::createWidget(QWidget *parent)
{
    return new custom(parent);
}

QString customPlugin::name() const
{
    return "custom";
}

QString customPlugin::group() const
{
    return "My Plugins";
}

QIcon customPlugin::icon() const
{
    return QIcon();
}

QString customPlugin::toolTip() const
{
    return QString();
}

QString customPlugin::whatsThis() const
{
    return QString();
}

bool customPlugin::isContainer() const
{
    return false;
}

QString customPlugin::domXml() const
{
    return "\n"
        " \n"
        "  \n"
        "   0\n"
        "   0\n"
        "   100\n"
        "   100\n"
        "  \n"
        " \n"
        "\n";
}

QString customPlugin::includeFile() const
{
    return "custom.h";
}

Q_EXPORT_PLUGIN2(custom, customPlugin)

#include "custom.h"
#include 
#include "customplugin.h"
customPlugin::customPlugin(QObject *parent)
	: QObject(parent)
{
	initialized = false;
}

void customPlugin::initialize(QDesignerFormEditorInterface */*core*/)
{
	if (initialized)
		return;
	initialized = true;
}

bool customPlugin::isInitialized() const
{
	return initialized;
}

QWidget *customPlugin::createWidget(QWidget *parent)
{
	return new custom(parent);
}

QString customPlugin::name() const
{
	return "custom";
}

QString customPlugin::group() const
{
	return "My Plugins";
}

QIcon customPlugin::icon() const
{
	return QIcon();
}

QString customPlugin::toolTip() const
{
	return QString();
}

QString customPlugin::whatsThis() const
{
	return QString();
}

bool customPlugin::isContainer() const
{
	return false;
}

QString customPlugin::domXml() const
{
	return "\n"
		" \n"
		"  \n"
		"   0\n"
		"   0\n"
		"   100\n"
		"   100\n"
		"  \n"
		" \n"
		"\n";
}

QString customPlugin::includeFile() const
{
	return "custom.h";
}

Q_EXPORT_PLUGIN2(custom, customPlugin)

 

在其cpp的最后必须 添加下面的宏:

 Q_EXPORT_PLUGIN2(customWidgetPlugin, CustomWidgetPlugin) // 第一个参数为插件的名字,第二个是插件类的名字(而不是自定义控件的类名)

2.  新建后，直接编译，会产生如下错误 

1>LINK : fatal error LNK1181: cannot open input file 'QtDesignerd.lib' 

      这是因为此工程默认引用的是QtDesignerd.lib库，更改其为版本对应的库即可消除故障（VS2008是在项目的属性中Linker/input/Additional Dependencies中修改，我这里Debug配置使用的是QtDesignerd4.lib，Release版本使用QtDesigner4.lib）。 

3、使用自定义插件

    1)、 只需要把通过Release模式生成的  项目.lib和项目.dll文件拷到C:\Qt\4.7.4\plugins\designer中，

    2)、 然后在QtDesigner中，选择菜单Help/About Plugin就可以看到你的自定义控件是否已经载入成功。

在QtDesigner中控件列表中有一项My Widget 中就有你的自定义控件。

参考：

1、  Qt自定义控件(插件)并添加到QtDesigher

打开QtDesigner,我们自定义的空间custom成功使用界面如下：